On Tue, Dec 17, 2013 at 10:22:19AM -0800, Jarno Rajahalme wrote:
> Commit da546e0 (dpif: Allow execute to modify the packet.) uninitializes
> the "dpif_upcall.packet" of "struct upcall" when dpif_recv() returns error.
> The packet ofpbuf is likely uninitialized in this case, hence calling
> ofpbuf_uninit() on it will likely cause a SEGFAULT.
> 
> This commit fixes this bug by only uninitializing packet's ofpbuf on
> successfully received upcalls.
> 
> A note warning about this is added on the comment of dpif_recv() in
> dpif-provider.h.
> 
> Reported-by: Alex Wang <al...@nicira.com>
> Signed-off-by: Jarno Rajahalme <jrajaha...@nicira.com>

I'd add a similar comment on dpif_recv() also.

Acked-by: Ben Pfaff <b...@nicira.com>

(Another approach would be to make dpif_recv() initialize the buffer
on error return.)
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